Sundial



May 15, 1928.

G. A. MOORE SUN DIAL Filed June 25, 1927 [five 111 61, I George AMOI'G;

Cl/DErne Fatented May 1928.

UNITED STATES PATENT oFFioE.

GEORGE A. MOORE, 0F MEDFORD, MASSACHUSETTS.

SUNDIAL.

Application filed June 25, 1927. Serial No. 201,365.

cardboard, with dilferingdials on the opposite sides, and a small compass adapted to be shifted from side to side; the compass being provided with means for adjusting its zero point to suit different locations in the same general section of the country.

In the drawings forming part of this specification, Fig. 1 is a plan view of a sun dial embodying my improvements. Fig. 2 is a cross section onthe line 22- in Fig. 1. Fig. 3 is a face view of the compass. Fig. 4: is a face view of mica shield and adjusting device. Fig. 5 is a face view of the cardbody alone, showing the opposite side to that in Fig. 1. Fig. 6 shows the two stiles superposed.

. As shown in Figs. 1 and 5, the card 1 is of convenient size to enter a vest pocket, and bears upon each side a representation of a watch '2 having the usual hour-spacings and figures. Through the card below the center of the watch is a hole 3 beneath which is located the compass 4 which is retained in place by means of studs 5 projecting from ears 6, the studs being pressed in through holes 7 in the card. To make room for the compass in the lower portion of the watch-face, the hour-spacings are all located between the hole 3 and the noon hour. I

The stile 10 is located on the card with its lowest point close to the compass, and is attached to the card by a metal strap 11 riveted at 12 to the card and having a socket 13 engaging a slot 14 in the stile to permit of folding the latter against the card. Rivets 18 in the card above and below the strap 11 beneath the hinged edge of the stile 1O serve to retain the latter in its right-angle position.

Markings 15 radiating from the lower end of the stile to the hour-spaces serve to render the shadow-line cast by the stile more clearly read.

The compass is covered by means of a disk 16 provided with perforated ears 17 matching the ears 6 of the compass and designed to be penetratedby the studs 5. As shown in Figs. 2 and 4, a second mica disk 19 is rotatably mounted on the disk 16, by a rivet 20, and is given one or more holes-21 for permitting it to be readily turned, as by a pencil point or' tooth-pick. These holes are designating points, by means of which to adjust the dial to different localities. In

. doing this, the device is held horizontally in the sun shine at some known hour and turned until the shadow of the stile strikes that hour. If the compass needle is not pointing towardthe noon hour of the watchface, as it seldoindoes, the disk 19 is care-' fully turned until its line 22 corresponds with the needle. .The sun dial is then in condition for measurably accurate determination of all hours of sun shine by turning the card until, the marking 22 is parallel with the needle.

What I claim as my invention is:

1. A sun dial comprisinga [card having suitable" markings upon both sides, stiles'on both sides, and a compass adapted to be attached to each side, said card having an opening through which to observethe compass needle.

2. A sun dial as set forth in claim 1, wherein the compass has lateral ears each provided with a stud, the cardhaving perforation adaptedto frictionally receive said studs, for holding the compass beneath said opening. 1

3. A sun dial markings upon each surface, a stile attached to each side, each stile being substantially triangular and differing from the other in shadow-casting angle, a compass, and means whereby it can be attached to either side ofthe card in order to be used in connection with either stile.

. 1 dial comprlslng a card havingv In testimony that I claim the foregoing inventioiuI have hereunto set my hand this 23rd dayof June, 1927.

GEORGE A. Moons, 

